Chemical fire-extinguisher.



PATENTED NOV. 19, 1907.

W. H. SHAFBR. CHEMICAL FIRE EXTINGUISHER.

APPLIOATION FILED MAY 16. 1906.

AM ,QMM M v12 Mama-ls Pcrrm co. \vAswm UNITED STATES PATENT OFFICE.

WILLIAM H. SHAFER,

OF CINCINNATI, OHIO.

CHEMICAL FIRE-EXTINGUISHER.

To all wkomZit may concern:

Be it known that I, WILLIAM H. SHAFER, a citizen of the United States,residing at Cincinnati, Ohio, have invented a new and useful Improvementin Chemical Fire-Ex tinguishers, of which the following is aspecification.

My invention relates to chemical fire extinguishers of the class adaptedto use on chemlcal fire engines or in combination with hose wagons, hosereels, ladder trucks or in other fixed positions, and the objects of myimprovement are to provide a horizontal pressure tank with a charginopening in one of its ends which is accessible to an operator whenstanding on the ground; to provide a closure or cap for said openingwith segmental threads whereby it may be removably secured therein by apartial turn; to provide a hinged arm adapted to carry said cap into orout of registration with said opening; to provide a guard to protect thehand 0 the operator from the acid in removing the acid jar from thetank; to provide a jar holder which may be adjusted in differentvertical angles to facilitate the discharge of the acid from the jartherein, and to combine simplicity and durability of construction Withfacility of operation and efficiency of action. These objects areobtained in the following described manner as illustrated in theaccompanying drawings, in which Figure 1 is a longitudinal diametricalsection of a chemical fire extinguisher embodying my improvements; Fig.2 an end elevation with parts in section on the line a-a of Fig. 1 Fig.3, a side elevation with parts broken away; Fig. 4 a side elevation ofthe closure provided with segmental threads; Fig. 5, a side elevationwith parts broken away and parts in section showing the trunnioned cagefor the acid jar, and Fig. 6, a detail showing the detent lever foractuating[ the ,trunnioned cage.

11 the drawings, 1 represents a cylindrical pressure tank mountedhorizontally in a fixed position and provided with a charging opening 2in its front end and with the usual overflow pipe 3, agitator 4, and thefilling and discharge pipe 5. A jar holder 6 is secured Within the tankwithits open end in Specification of Letters Patent.

Application filed May 16.

Patented Nov. 19, 1907.

1906. Serial No. 317.104.

registration with opening 2, and it may be secured in a horizontalosition therein as shown in Fig. 1, or trunnioned and movable invertical angles by detent lever 7 as shown in Figs. 5 and 6.

Ring 8 projects beyond opening 2 in the tank and is provided with a softmetal valve seat 9 and with internal segmental threads 11 of coarsepitch. Swinging arm 12 is hinged on said ring and closure or cap 13 isswiveled thereon. Said cap is provided with handle 14 and with externalsegmental threads 15 ada ted to detachably engage with correspon ingthreads 11 and close opening 2 by a partial turn of the cap.

Sleeve 16 provided with hand wheel 17 is rotatively secured within anaxial openin in the cap and valve 18 provided with a hol ow stem 19 isthereby threaded within the sleeve. By means of hand wheel 17 said valvemay be forced in contact with seat 9 within rin 8 after the opening 2 isclosed by means of t 1e cap.

The acid jar 22 is incased within a metal jacket 23 which is providedwith a removable perforated cage 24 on its front end. Said jar and cagemay be inserted through opening 2 and seated in non-rotative positionwithin the jar holder 6. Cage 24 is formed with a transverse guard orpartition 25 which contains an axial openin 26. Stopper stem 27 formedwith a socket in its front end is adjustably threaded in the front wallof cage 24 and jar stopper 28 is swiveled on its rear end and inregistration with the mouth of the acid jar by means of cupped flange29. Key 31 adapted to detachably engage with the socket in the stopperstem and provided with hand wheel 32 is rotatively and longitudinallyadjustable through the hollow valve stem 19. By means of said key thestopper stem may be turned to effect the removal of the stopper from thejar when the cap is closed and there after to close the opening 26 inpartition 25 to protect the hand of the operator from the acid inremoving the jar from the tank. The key and the agitator shaft are eachprovided with the usual stufling box.

In operation, carbonate of soda is first placed within the tank. Thecontaining sulfuric acid is then inserted through the charging openingin the tank and placed within the jar holder. During the admission ofwater through pipe 5 said opening may be closed by a partial turn of cap13 and valve 18 closed 011 seat 9 by means of hand wheel 17. The properamount of water in the tank will be indicated by the overflow throughpipe 3 when its admission should be discontinued and theoverflow pipeclosed in the usual manner, and the nozzle hose placed in communicationwith the discharge pipe. By means of hand wheel 32, key 31 may now beengaged with and caused to turn stem 27 and thereby remove the stopperfrom the jar to permit the discharge of the acid therefrom which may befacilitated by partially inverting the jar with the trunnioned holder.The agitator serves to facilitate the mingling of the acid with the sodaand water which generates a pressure suflicient to cause its dischargewith much force through the discharge pipe. After the tank is empty,valve 18 is relieved from its seat and cap 13 is disengaged and carriedby means of the hinged arm to one side of the discharge opening. Theempty jar may then be removed and the soda and another loaded jarinserted and the recharging of the tank completed as above described andrepeated as often as desired.

Having fully described my improvement, what I claim as my invention anddesire to secure by Letters Patent of the United States is 1. Thecombination of a removable jacket adapted to inclose a jar, a cageremovably secured to the jacket, a stern adjustably threaded in thecage, and a stopper swiveled on the stem for closing the jar.

2. The combination of a jar holder secured within a tank, a jacketadapted to be removably emplaced therein and provided with a removablecage a jar within the jacket, a stem adjustably secured within the cageand provided with a stopper, and means for actuating the stem from theexterior of the tank.

3. The combination of a pressure tank provided with a charging openingand with a jar holder, a jacket adapted to be inserted through saidopening and emplaced within the holder a jar emplaced within the jacket,a cage removably secured on the jacket, and a stem adjustably securedin'the cage and provided with a stopper, for the purpose specified.

4. The combination of a pressure tank provided with a charging opening,an overflow pipe and with a filling and discharge pipe, a jar holdersecured within the tank in registration with said opening, an arm hingedon the tank, a closure swiveled thereon and movable thereby intoregistration with the opening and adapted to close the opening by apartial turn thereof, and a valve adjustable on said closure and adaptedto close said opening at a point thereunder.

5.. The combination of a pressure tank provided with a charging opening,a ar holder secured thereinin registration with said opening, a cageremovably supported within the holder and provided with an adjustable ofits ends, a closure for the opening, a jacket provided with a removablecage a jar within the acket, a stem adjustably secured within the cageand providedwith a stopper for the jar, a'holder within the tank for theacket, and a key movable longitudinally through the closure fordetachably engagingwith and actuating the stem to remove the stopperfrom the ar.

7. The combination of a cylindrical pressure tank mounted .in ahorizontal posltion and provided with an overflow pipe, with a fillingand discharge pipe and with a charging opening, the walls of said 0ening being provided with segmental threa ds, a closure provided withsegmental threads adapted to cooperate with said former threads forclosing the opening, and an arm hinged at a fixed point for movablysupporting the closure when disengaged from the body.

8. The combination of a cylindrical tank mounted in a horizontalposition and rovided with an opening in one of its enc s, a jar holdertrunnioned therein, means for moving and maintaining the holder inregistration with the opening, a jacket provided with a stopper andadapted to be inserted through the opening and removably emplaced withinthe holder, a jar inclosed within the acket, and means for moving thesto per, in the axial line of the holder, from t e outside of the tank.

9. The combination of a cylindrical pressure tank mounted in ahorizontal position and provided with a charging opening in one of itsends, with a filling and discharge pipe, with an overflow pipe, with anagitator and with a jar holder, a jacket adapted to be inserted throughthe opening and removably emplaced within the holder said jacket beingprovided with a removable cage, a jar within the jacket, a stemadjustably secured within the cage, a stopper swiveled thereon, an armhinged on the tank, a closure swiveled thereon, and a key movablysecured therein and arranged to detachably engagewith and acandlongitudinally movable therein for the filllatefthfi stem With thestopper in the axial purpose specified.

' e 0 t e cage.

10. The combination of a pressure tank WILLIAM SHAFER' 5 provided withan opening, an arm hinged at Witnesses:

a fixed point, a double closure swiveled R. S. CARR, thereon for theopening, and a key rotatively MARY E. CARR.

